KR101329252B1 - Series connection apparatus of battery module - Google Patents

Series connection apparatus of battery module Download PDF

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Publication number
KR101329252B1
KR101329252B1 KR1020120075346A KR20120075346A KR101329252B1 KR 101329252 B1 KR101329252 B1 KR 101329252B1 KR 1020120075346 A KR1020120075346 A KR 1020120075346A KR 20120075346 A KR20120075346 A KR 20120075346A KR 101329252 B1 KR101329252 B1 KR 101329252B1
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KR
South Korea
Prior art keywords
bus bar
substrate
base
seating
coupling
Prior art date
Application number
KR1020120075346A
Other languages
Korean (ko)
Inventor
조경민
Original Assignee
한국단자공업 주식회사
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Priority to KR1020120075346A priority Critical patent/KR101329252B1/en
Application granted granted Critical
Publication of KR101329252B1 publication Critical patent/KR101329252B1/en

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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/20Current conducting connections for cells
    • H01M2/202Interconnectors for or interconnection of the terminals of adjacent or distinct batteries or cells
    • H01M2/206Interconnectors for or interconnection of the terminals of adjacent or distinct batteries or cells of large-sized cells or batteries, e.g. starting, lighting or ignition [SLI] batteries, traction or motive power type or standby power batteries
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/10Mountings; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M2/1016Cabinets, cases, fixing devices, adapters, racks or battery packs
    • H01M2/1072Cabinets, cases, fixing devices, adapters, racks or battery packs for starting, lighting or ignition batteries; Vehicle traction batteries; Stationary or load leading batteries
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/10Mountings; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M2/1016Cabinets, cases, fixing devices, adapters, racks or battery packs
    • H01M2/1072Cabinets, cases, fixing devices, adapters, racks or battery packs for starting, lighting or ignition batteries; Vehicle traction batteries; Stationary or load leading batteries
    • H01M2/1083Fixing on vehicles
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/20Current conducting connections for cells
    • H01M2/30Terminals
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00Batteries for particular applications
    • H01M2220/20Batteries in motive systems, e.g. vehicle, ship, plane
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The present invention relates to a series connection device for a battery module. The present invention includes a base 10, a cover 20, a cell bus bar 30 and a substrate 40. The base 10 is provided with a bus bar seating end 11 and a base side coupling end 16, and the cover 20 is coupled to the bus bar pressing portion 21 and the base side coupling end 16 Coupling end 26 is formed. The bus bar bus bar part 11 is seated on the fixing piece 31 of the selbus bar 30, and both ends of the fixing piece 31 have first and second connecting pieces 36 and 37 connected to the base ( 10 is provided to protrude out of the base 10 through the base through slit 15. A substrate seating portion 10 " is formed along the longitudinal center of the base 10 so that the substrate 40 is seated thereon. The electrical connection between the cell bus bars 30 is established by the substrate 40. The substrate 40 serves as insulation and reinforcement by using a flexible substrate and an insulating plate 41 installed on one surface thereof. According to the present invention, transmission of vibration through the substrate 40 is blocked, There is an advantage that the vibration is transmitted from the cell bus bar 30 after the assembly operation, and the space occupied by the substrate 40 in the thickness direction of the series connection device is minimized.

Description

Series connection apparatus of battery module

The present invention relates to a series connection device for a battery module, and more particularly, to a battery module serial connection using a flexible substrate in the electrical connection of the battery cells of the entire battery module is electrically connected to the positive and negative electrodes of the battery cells, respectively. Relates to a device.

A battery used in an electric vehicle is configured by connecting a plurality of battery modules to supply as much power as necessary. In this case, when the battery cells constituting each of the battery modules are connected in series, a large amount of power can be supplied, thereby configuring the battery by connecting the battery cells of the battery modules in series.

In order to connect the battery cells in series, the terminals connected to the wires are connected to both terminals and the negative terminals of each battery cell to connect the respective battery cells in series. However, when connecting the battery cells in series using a wire provided with a terminal in this way, the number of wires for connecting the battery cells increases, there is a problem that the configuration is complicated.

In addition, in order to connect the battery cells using the wires provided with the terminals, it becomes cumbersome to connect the terminals of the respective wires to both terminals or the negative terminals of the corresponding battery cells. That is, since there are both terminals and negative terminals in each of the plurality of battery cells, it is very cumbersome to connect the plurality of wires correctly.

In order to solve such a problem, research has recently been made to make a device for electrically connecting a cell bus bar that is directly coupled to both terminals and a negative terminal of a battery cell using a printed circuit board. In this case, when the printed circuit board is made of a general rigid plate, there is a problem in that vibrations are severely transmitted between the cell bus bar and the substrate in the manufacturing and use processes, and the physical connection of the cell bus bar also becomes difficult. There is a problem.

Republic of Korea Patent Registration 10-0394682

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the prior art as described above, and is flexible in that the connecting pieces of the cell bus bars are directly connected to the positive and negative poles of the respective battery cells without wires. It is to use a substrate.

According to a feature of the present invention for achieving the above object, the present invention is a substrate seating portion is formed in the longitudinal direction along the center and the busbar seating end and the base-side coupling end corresponding to each other around the substrate seating portion corresponding to each other The bus bar seating end and the base side coupling end are alternately formed on both sides of the substrate seating part, respectively, and the bus bar pushing end is seated on the upper surface of the base to be coupled with the base and corresponding to the bus bar seating end. Protruded to the outside of the base on both ends of the cover and the cover side coupling end is formed to be coupled to the base-side coupling end, and the fixing piece which is seated on the bus bar seating end of the base is pressed and fixed by the bus bar pressing end Selbus bars made of a conductive material provided with the first and second connecting pieces, and placed on the substrate mounting portion of the base And the cell is combined with a bus bar is electrically connected to a substrate made of a flexible material.

The substrate pressing rib protrudes from the cover to correspond to the substrate seating portion.

The substrate has an insulating plate made of an insulating material located on one surface thereof to perform the function of insulation and reinforcement.

The substrate is formed by projecting a plurality of connection coupling portions for electrically and physically connecting the cell bus bar, and the connection coupling portion is provided with a separate reinforcing plate.

The substrate is further provided with a blocking element that is disconnected when the overload.

The substrate is mounted with a terminal that sends the state information of the battery cell entered through the cell bus bar to the outside.

According to the battery module serial connection device according to the present invention the following effects can be obtained.

First, in the series connection device of the present invention, the electrical connection between the connecting pieces is made using a flexible substrate. Therefore, there is an effect that the transmission of vibration through the flexible substrate between the connecting pieces is minimized.

In addition, since an insulating plate is provided on one surface of the flexible substrate, the insulating substrate is well insulated from the cell bus bar, and the flexible substrate can be easily handled.

In addition, since the rivets can be used for the combination with the cell bus bar, the physical connection between the cell bus bar and the substrate is more robust.

In the present invention, since the flexible substrate is disposed along the longitudinal center of the base between the base and the cover without using a wire in the serial connection device, the configuration for the electrical connection between the cell bus bars is simpler. .

In addition, in the use of the flexible substrate as described above, using an insulating plate of insulating material, the thickness of the insulating plate is appropriate and the height of the series connection device is minimized as a whole by minimizing the overlapping portion of the cell bus bar and the substrate in the base and cover You can expect.

In addition, the insulating plate corresponding to the coupling portion of the flexible substrate is separated from the insulating plate of the other portion, so that the flow during the riveting operation of the coupling coupling portion does not reach the insulating plate and the flexible substrate of the other portion.

1 is a perspective view showing the configuration of a preferred embodiment of a series connection device for a battery module according to the present invention.
Figure 2 is a bottom perspective view showing the configuration of this embodiment.
Figure 3 is an exploded perspective view showing the overall configuration of this embodiment.
Figure 4 is a cross-sectional view showing a longitudinal section of the embodiment of the present invention.
Figure 5 is a cross-sectional perspective view showing the main portion of the embodiment of the present invention.
Figure 6 is an enlarged perspective view of the upper surface of the base constituting the embodiment of the present invention.
Figure 7 is an enlarged perspective view of the lower surface of the cover constituting the embodiment of the present invention.
8 is a perspective view of a selbus bar constituting an embodiment of the present invention;

Hereinafter, a preferred embodiment of a serial connection device for a battery module according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in the figures, the series connection device of the embodiment of the present invention has a substantially flat plate shape. A base 10 made of an insulating material is formed at the bottom of the series connection device. The base 10 is generally made of synthetic resin. The base 10 has a substantially rectangular plate shape. A plurality of hook protrusions 10 ′ surrounding the edges of the base 10 are formed. The hook protrusion 10 ′ has a cantilever shape that is elastically deformable, and a hook jaw (not shown) is protruded from the front end thereof. The hook protrusion 10 ′ is for coupling with the cover 20 to be described below, and a plurality of hook protrusions 10 'are formed. The number of the hook protrusions 10 'varies depending on the size of the base 10.

A substrate seating portion 10 "is formed to extend along the longitudinal center of the base 10. The substrate seating portion 10" is formed to have a predetermined width in the longitudinal center of the base 10. do. The substrate seating portion 10 ″ is formed to have a relatively short width compared to the length thereof. The substrate seating portion 10 ″ is provided with a substrate 40 to be described below.

A plurality of bus bar seating ends 11 are formed on both sides of the substrate seating portion 10 ″. The bus bar seating ends 11 are alternately formed with the base side coupling end 16 to be described below. The bus bar seating end 11 is formed to extend between the substrate seating portion 10 ″ and both widthwise ends of the base 10. The extension direction of the bus bar seating end 11 is made such that the longitudinal direction of the substrate seating portion 10 " and the virtual extension line are perpendicular to each other.

The bus bar seating ends 11 are alternately formed at both ends of the substrate seating portion 10 ″. That is, the bus bars are positioned at positions corresponding to each other based on the substrate seating portion 10 ″. The seating end 11 and the base side coupling end 16 are formed to correspond to each other. At both ends of the bus bar seating end 11 in a width direction, a seating end fence 11 'protrudes at a predetermined height in a longitudinal direction. The seating end fence 11 ′ is formed to substantially surround the edge of the bus bar seating end 11, but is not formed at the middle portions of both ends of the bus bar seating end 11 in the longitudinal direction.

As shown in FIG. 6, a seating rib 12 is formed at the bus bar seating end 11. The seating ribs 12 protrude from the bottom of the base 10 and are made in a grid shape. The shape of the seating rib 12 may be made in various forms in addition to those of the illustrated embodiment. That is, in FIG. 6, a part of the seating rib 12 is semicircular, and the seating rib 12 may be made in various forms. The seating ribs 12 are seated with a cell bus bar 30 to be described below.

A bus bar fusion protrusion 12 ′ is formed at the bus bar seating end 11 on which the seating rib 12 is formed. The bus bar fusion protrusion 12 ′ serves to fix the cell bus bar 30 to the bus bar seat end 11. The bus bar fusion protrusion 12 ′ is formed to protrude on the seating rib 12 at a point where the seating rib 12 intersects.

A plurality of position guide protrusions 13 are formed at positions corresponding to the edges of the base 10 in the bus bar seating end 11. The position guide protrusion 13 is formed to protrude to the edge of the bus bar seating end 11 of the base 10, the flow preventing protrusion 34 of the cell bus bar 30 is located between. In the present embodiment, two position guide protrusions 13 are formed, and the flow preventing protrusions 34 between the position guide protrusions 13 and between the position guide protrusions 13 and the seating end fence 11 '. Is seated to hold the position of the cell bus bar 30 to prevent flow.

A hook hole 13 'is formed on the opposite side of the position guide protrusion 13, that is, the bus bar seating end 11 corresponding to the substrate seating portion 10 ". The hook hole 13' ) And the substrate hanger 33 'of the cell bus bar 30 is inserted and hooked in. In this embodiment, two hanger holes 13' are formed.

On the other hand, the bus bar seat end 11 is formed with a rivet hole (14). The rivet hole 14 is a portion where a portion of the rivet 43 'will be described below. The rivet hole 14 is formed at a position adjacent to the substrate seating portion 10 ″ at the bus bar seating end 11, that is, at a position adjacent to the hooking hole 13 ′, and the bus bar seating end 11 is formed. It is formed on any one side of the portion corresponding to the longitudinal center axis of.

A base through slit 15 is formed along both widthwise ends of the bus bar seating end 11, that is, the seating end fence 11 ′. The base through slit 15 penetrates through the first and second connection pieces 36 and 37 of the cell bus bar 30 seated at the bus bar seating end 11 to the lower outside of the base 10. It is a part to make it protrude. The first and second connection pieces 36 and 37 protruding to the outside of the base 10 through the base through slit 15 are combined with the positive and negative electrodes of the battery cell.

A base side coupling end 16 is formed between each bus bar seating end 11. That is, the base side coupling end 16 and the bus bar seating end 11 are alternately formed on the base 10. The base side coupling end 16 is coupled with the cover side coupling end 26 of the cover 20 to be described below. In the present embodiment, the base side coupling end 16 and the cover side coupling end 26 are joined to each other by ultrasonic welding. A coupling end seating groove 16 ′ is formed at the base side coupling end 16. The coupling end seating groove 16 ′ is formed to be recessed in the upper surface of the base 10. The coupling end seating groove 16 ′ is seated and coupled to the cover side coupling end 26 to be described below. . The base coupling end 16 is further provided with a cover coupling protrusion 16 ". The cover coupling protrusion 16" is formed to protrude perpendicularly to the bottom of the coupling end seating groove 16 '. In the example, two are formed. However, the cover coupling protrusion 16 ″ does not have to be provided. If the cover coupling protrusion 16 ″ is provided, the coupling between the base 10 and the cover 20 may be more firm. The cover coupling protrusion 16 ″ may be press-fitted and fused into the cover coupling hole 26 ′ of the cover 20 to be described below.

End bus bar seating ends 17 are formed at both ends of the base 10. The end bus bar seating end 17 is a portion on which the end bus bar 30 ', which will be described below, is seated. The end bus bar seating end 17 is formed to correspond to the configuration of the end bus bar 30 '. In the present embodiment, when viewed in plan, the end bus bar seating end 17 has a substantially '-' shape. The end bus bar seating end 17 is formed at opposite ends of the base 10 on which the mounting bolt 18 'is mounted in this embodiment.

A mounting bolt coupling portion 18 is formed on the opposite side of the end bus bar seating end 17, that is, on the opposite side of the substrate seating portion 10 ". The mounting bolt 18 is mounted on the mounting bolt coupling portion 18. The mounting bolt 18 is configured to fix the entire series connection device to one side of the battery.

The connector portion 19 protrudes to protrude to the bottom of the base 10. The connector portion 19 is a portion through which the terminal 42 to be described below is installed. The connector portion 19 corresponds to a housing of a general connector. The connector 19 is coupled to the mating connector for electrical connection to the outside. The connector unit 19 is connected to the control unit of the vehicle to provide information on the state of charge of each battery cell.

The cover 20 is coupled to the upper surface of the base 10. The cover 20 may have a shape corresponding to the shape of the base 10. In the present embodiment, the cover 20 is a rectangular plate and made of an insulating material.

The bus bar pressing end 21 is formed at a position corresponding to the bus bar seating end 11 in the cover 20. The bus bar pushing end 21 is a part for pressing the cell bus bar 30 seated on the bus bar seating end 11. To this end, the pressing rib 22 protrudes from the lower surface of the bus bar pressing end 21. In this embodiment, the push rib 22 extends along the edge of the fixing piece 31 of the selbus bar 30 as shown in FIGS. 5 and 7, and in the width direction of the fixing piece 31. It is formed to extend. Cover through slits 25 are formed at both ends of the bus bar pushing end 21 in the width direction. The cover through slit 25 is formed at a position corresponding to the base through slit 15.

A cover side coupling end 26 is formed between the bus bar pushing ends 21. The cover side coupling end 26 is formed at a position corresponding to the base side coupling end 16, and is formed to protrude toward the base 10 on the bottom surface of the cover 20. The cover side coupling end 26 protrudes to be seated in the coupling end seating groove 16 ′. The cover side coupling end 26 is formed with a cover coupling hole 26 '. The cover coupling protrusion 26 ′ is installed through the cover coupling hole 26 ′.

End bus bar pressing ends 27 are formed at both ends in the longitudinal direction of the cover 20. The end bus bar pushing end 27 is formed at a position corresponding to the end bus bar seating end 17. The end bus bar pressing end 27 serves to press and hold the end bus bar 30 ', which will be described below.

A substrate pressing rib 29 is formed on the bottom surface of the cover 20 along the center of the longitudinal direction of the cover 20. The substrate pressing rib 29 is formed to protrude on the lower surface of the cover 20 and may have various shapes. In the present embodiment, as shown in Figure 7 is formed in a square and cross shape. However, the shape of the substrate pressing rib 29 may be variously made.

Cell bus bar 30 is made of a cross-section '' 'shape. The cell bus bar 30 is made of a conductive material. Preferably the cell bus bar 30 is made of a metal material. The cell bus bar 30 is provided with a fixing piece 31 seated on the bus bar seating end 11 of the base 10. The fixing piece 31 has a rectangular plate shape. As shown in FIG. 8, the fixing piece 31 penetrates through the fixing piece 31. The bus bar fusion protrusions 12 ′ are installed through the fixing holes 31 ′. The bus bar fusion protrusion 12 ′ has a part of its tip melted so that the cell bus bar 30 is fixed to the bus bar seating end 11.

The fixing piece 31 of the cell bus bar 30 is also provided with a coupling hole (32). Rivets 43 ′, which will be described below, pass through the coupling hole 32.

A base hanger 33 is provided at one end in the longitudinal direction of the fixing piece 31. The base hook protrusion 33 is formed to be orthogonally bent at one end of the fixing piece 31, in this embodiment two are formed at a predetermined interval. The base hook protrusion 33 is inserted into the hook hole 13 'of the bus bar seating end 11 to be hooked. The base hook protrusion 33 is prevented from flowing by the cell bus bar 30 by being hooked to the hook hole 13 '.

A substrate hanger 33 ′ is formed at one end of the fixing piece 31 on which the base hanger protrusion 33 is formed. The substrate hanger 33 'is formed between the base hanger 33. As shown in FIG. More precisely, the substrate hanger 33 ′ is formed on the longitudinal center line of the fixing piece 31. The substrate hanger 33 ′ is inserted into a through hole (not shown) formed in the connection coupling portion 43 of the substrate 40 to be described below to couple between the substrate 40 and the cell bus bar 30. Play a role.

A flow preventing protrusion 34 is formed at an opposite end of the fixing piece 31 on which the substrate hanger 33 'is formed. The flow preventing protrusion 34 is formed to protrude from the fixing piece 31 and is positioned adjacent to the position guide protrusion 13 of the bus bar seating end 11. The flow preventing protrusion 34 is positioned between the position guide protrusion 13 and the position guide protrusion 13 and the seating end fence 11 ′, thereby preventing the flow of the cell bus bar 30.

First and second connection pieces 36 and 37 extend at both ends in the width direction of the fixing piece 31, respectively. The first and second connecting pieces 36 and 37 are bent perpendicularly to the fixing piece 31 in a rectangular plate shape, respectively. The first and second connection pieces 36 and 37 are respectively coupled to and electrically connected to the positive electrode or the negative electrode of the battery cell.

On the other hand, there is an end bus bar (30 ') having the same function as the cell bus bar (30). The end bus bar 30 'is for matching the number of positive and negative electrodes of the battery cell connected by the entire series connection device, and has one connection piece and is coupled to only one of the positive and negative electrodes of the battery cell. In fact, a part of the end bus bar 30 ′ has a shape in which one connection piece is removed from the cell bus bar 30. The end bus bar 30 ′ is formed by extending a connection terminal portion 38 for electrical connection with the outside. The connection terminal portion 38 extends in a direction orthogonal to the extending direction of the end bus bar 30 '. A connecting bolt 38 ′ penetrates the connection terminal part 38. The connection bolt 38 ′ may be equipped with a ring terminal (not shown) for electrical connection with the outside.

The substrate 40 is for performing an electrical connection between the cell bus bar 30 and the end bus bar 30 '. At the same time, the substrate 40 is also provided with a blocking element for shutting off the power when overloaded. Examples of the blocking device include a fuse, a multi switch, and the like.

The substrate 40 uses a flexible substrate. This is because the thickness of the flexible substrate is very thin. An insulating plate 41 is attached to one surface of the substrate 40. The insulating plate 41 has a shape substantially the same as that of the substrate 40 and serves to reinforce the entire substrate 40. The insulating plate 41 is preferably made of an insulating material so as to serve as insulation. It is preferable that the insulating plate 41 has a maximum thickness within a range that does not increase the thickness of the entire apparatus.

The substrate 40 is provided with a terminal 42 located in the connector portion 19. The terminal 42 is installed inside the connector unit 19 in a state where the terminal 42 is mounted on the substrate 40 to perform electrical connection with the outside. The terminal 42 penetrates through the insulating plate 41 in a state in which the terminal 42 is mounted on the substrate 40.

The substrate 40 has a long rectangular shape in one direction as a whole, and the connection coupling portion 43 for connecting the cell bus bar 30 or the end bus bar 30 ′ is provided at both sides of the substrate 40 in the width direction. It is provided. The connection coupling part 43 is for electrical connection and physical connection with the cell bus bar 30. The connection coupling portion 43 is formed by the number of the cell bus bar 30. The connection coupling portion 43 and the cell bus bar 30 are fastened to each other by rivets 43 '.

The insulating coupling plate 41 is also provided at the connection coupling part 43, and the insulating plate 41 is separately separated from the connection coupling part 43. This is to prevent the shock when the connecting coupling part 43 is riveted with the cell bus bar 30 and to allow the position where the riveting is installed to some extent free. However, the connection coupling portion 43 is maintained in the state formed integrally with the substrate 40.

Hereinafter will be described in detail that the series connection device for a battery module according to the present invention having the configuration as described above is assembled and used.

The serial connection device for a battery module of the present invention is such that the connecting pieces 36 and 37 of the cell bus bar 30 and the end bus bar 30 'are coupled to the positive and negative electrodes of the plurality of battery cells constituting the battery module. Thus, a plurality of battery cells are connected in series.

To this end, first, the cell bus bar 30 and the end bus bar 30 ′ are seated on the bus bar seat end 11 and the end bus bar seat end 17 of the base 10. The fixing piece 31 of the cell bus bar 30 is seated on the seating rib 12 of the bus bar seating end 11, and the bus bar fusion protrusion 12 ′ is fixed to the fixing piece 31. It passes through the fixing hole 31 '.

At this time, the base hook protrusion 33 of the fixing piece 31 is inserted into the hook hole 13 ', and the flow preventing protrusion 34 is located between and adjacent to the position guide protrusion 13. do. Therefore, the cell bus bar 30 is fixed in the correct position without flowing in the bus bar seating end (11). In this state, the tip of the bus bar fusion protrusion 12 ″ is melted by ultrasonic so as not to fall out of the fixing hole 31 ′.

Next, the substrate 40 is seated on the substrate mounting portion 10 ″. The substrate 40 has the connection coupling portion 43 at positions corresponding to the cell bus bars 30, respectively. The connection coupling portion 43 corresponds to the coupling hole 32 of the cell bus bar 30, and is fastened to each other using a rivet 43 ', wherein the substrate hanger 33' is connected to the connection hole 32. It is projected to penetrate through one side of the coupling portion 43. In this configuration, the connection coupling portion 43 and the cell bus bar 30 are coupled to each other when fixing the rivet 43 '. Make sure

In addition, although the connection coupling part 43 is connected to the substrate 40, the insulating plate 41 installed in the connection coupling part 43 is the substrate 40 as shown in the enlarged view of FIG. 3. Is separated from the part of the insulating plate 41 which supports the whole. Therefore, the impact in the process of riveting the connection coupling portion 43 is not transmitted from the connection coupling portion 43 toward the substrate 40.

In addition, the body side of the connection coupling portion 43 and the substrate 40 can be moved relative position. This is because the substrate 40 is made of a flexible substrate and the insulating plates 41 are not connected to each other.

When the rivet 43 'is fixed while the substrate 40 is seated on the substrate seat 10 ", the substrate 40 is driven by the cell bus bar 30 on the base 10. The terminal 42 in the substrate 40 is inserted into the connector 19.

As such, the cover 20 is coupled to the base 10 in a state in which the substrate 40 and the cell bus bar 30 are mounted on the base 10. That is, the hook protrusion 10 'of the base 10 may be hooked to the hook end 20' of the cover 20.

In this process, the cover coupling protrusion 16 "protruding from the base side coupling end 16 of the base 10 is coupled to the cover coupling hole 26 'formed in the cover 20. Further, the cover The side coupling end 26 is inserted into the coupling end seating groove 16 ′ formed in the base-side seating end 16 of the base 10 to be seated.

When the ultrasonic welding operation is performed while the cover 20 is coupled to the base 10 as described above, the surface of the cover side coupling end 26 is attached to the coupling end seating groove 16 ″ of the base side coupling end 16. In this case, the cell bus bar 30 seated on the bus bar seat end 11 is pressed by the push rib 22 of the bus bar push end 21. It can be maintained so that the cell bus bar 30 does not flow arbitrarily.

In this process, the substrate 40 seated on the substrate seating portion 10 ″ of the base 10 is pressed and fixed by the substrate pressing rib 29 of the cover 20.

As such, when the coupling between the base 10 and the cover 20 is completed, the cell bus bar 30 and the end bus bar 30 ′ are fixed in position and the first and the lower portions of the base 10 are fixed to the base 10. The second connecting pieces 36 and 37 protrude. This state is well illustrated in FIGS. 1 and 2.

1 and 2 is used in the first and second connecting pieces 36 and 37 of the cell bus bars 30 are coupled to the positive and negative electrodes of the battery cell. Coupling between the cell bus bar 30 and the end bus bar 30 'and the positive and negative electrodes of the battery cell is performed by friction welding or ultrasonic welding. When friction welding or ultrasonic welding is performed, vibration is given to the cell bus bar 30, but the cell bus bar 30 is firmly fixed to the bus bar seat end 11 so that the coupling is performed accurately without flow. Can be.

In this case, since the first and second connection pieces 36 and 37 of one cell bus bar 30 connect the positive and negative electrodes of adjacent battery cells with each other, the entire battery cells may be connected in series. Will be.

On the other hand, in the present invention, the flexible substrate is used as the substrate 40 and the cell bus bars 30 are positioned in a space between them arranged in rows. Therefore, the substrate 40 hardly occupies a space in the height direction in the space formed by the base 10 and the cover 20, so that the height of the entire series connection device can be made low.

In addition, since the substrate 40 is reinforced by the insulating plate 41, impact or vibration does not act on the substrate 40 at the time of assembly or use, and there is no problem in insulation during operation.

The scope of the present invention is not limited to the embodiments described above, but may be defined by the scope of the claims, and those skilled in the art may make various modifications and alterations within the scope of the claims It is self-evident.

For example, the shape of the cover 10 and the base 20 of the illustrated embodiment may be variously made in a range that does not impair the original function.

In the illustrated embodiment, an end bus bar having only one connection piece is used, but is not necessarily required and may not be used depending on design conditions.

In addition, the said insulating plate 41 is not necessarily required and may be used only when the reinforcement of the flexible substrate 40 is needed.

In the illustrated embodiment, the connection coupling portion 43 is fixed to the cell bus bar 30 and the rivet 43 ', but not necessarily, various fastening means may be used. However, the use of the rivet 43 'is good in terms of workability.

10: base 10 '; Hanger
10 ": PCB seating section 11: Busbar seating end
12: Seating rib 13: Position guide protrusion
13 ': Hanger 14: Rivet
15: Base through slit 16: Base side coupling end
16 ': Coupling end seating groove 16 ": Cover coupling protrusion
17: End bus bar mounting end 18: Mounting bolt coupling portion
18 ': Mounting bolt 19: Connector part
20: cover 20 ': hanger
21: Press busbar 22: Press rib
25: cover through slit 26: cover side coupling end
26 ': Cover fitting hole 27: End bus bar push end
29: substrate press rib 30: cell bus bar
31: fixing hole 31 ': fixing hole
32: coupling hole 33: base hook protrusion
33 ': substrate hanger 34: flow preventing protrusion
36: first connection piece 37: second connection piece
40: substrate 41: insulating plate
43: coupling part

Claims (6)

  1. A substrate seat is formed in a longitudinal direction along a center thereof, and busbar seating ends and base-side coupling ends are located at both sides of the substrate seating part, respectively, and both sides of the board seating part are respectively the busbar seating ends and the base-side coupling ends. This alternately formed base,
    A cover seated on an upper surface of the base and coupled to the base, and a bus bar pressing end to correspond to the bus bar seating end, and a cover side engaging end to be coupled to the base side engaging end;
    A cell bus bar made of a conductive material having first and second connection pieces projecting out of the base at both ends of a fixing piece seated on the bus bar seating end of the base and pressed and fixed by the bus bar pushing end;
    A serial connection device for a battery module comprising a substrate seated on the substrate seating portion of the base and coupled to the cell bus bars and electrically connected and made of a flexible material.
  2. The battery pack serial connection device of claim 1, wherein a substrate pressing rib protrudes from the cover to correspond to the substrate seating portion.
  3. The series connection device for a battery module according to claim 1 or 2, wherein the substrate is provided with an insulating plate made of an insulating material on one surface thereof to perform a function of insulation and a function of reinforcement.
  4. The series connection device of claim 3, wherein a connection reinforcing part electrically and physically connected to the cell bus bar on the substrate is provided with a separate reinforcement plate.
  5. 5. The series connection device of claim 4, wherein the substrate further includes a blocking element that cuts off the connection when the substrate is overloaded.
  6. The serial connection device of claim 5, wherein a terminal is mounted on the substrate to transmit external status information of the battery cells introduced through the cell bus bar.
KR1020120075346A 2012-07-11 2012-07-11 Series connection apparatus of battery module KR101329252B1 (en)

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WO2017014470A1 (en) * 2015-07-22 2017-01-26 주식회사 엘지화학 Battery module assembly and battery pack including same
KR20170019942A (en) 2015-08-13 2017-02-22 한국단자공업 주식회사 Bus bar having connect part and Bus bar assembly having the same
KR20170025524A (en) 2015-08-28 2017-03-08 한국단자공업 주식회사 Flexible PCB assembly and series connection apparatus of battery module the same
WO2018124751A1 (en) * 2016-12-27 2018-07-05 주식회사 유라코퍼레이션 Flexible circuit board and frame assembly including same
KR20180077695A (en) * 2016-12-29 2018-07-09 주식회사 유라코퍼레이션 Connecting structure of bus-bar assembly
KR20180099437A (en) * 2017-02-28 2018-09-05 주식회사 유라코퍼레이션 Battery frame assembly and method for manufacturing same
KR101919035B1 (en) * 2017-04-21 2018-11-15 한국단자공업 주식회사 Series connection apparatus of battery module
KR101928073B1 (en) 2016-12-27 2018-12-11 주식회사 유라코퍼레이션 Connecting structure of bus-bar assembly
KR101928065B1 (en) 2016-12-27 2018-12-11 주식회사 유라코퍼레이션 Connecting structure of bus-bar assembly
KR101948067B1 (en) 2017-05-31 2019-02-14 한국단자공업 주식회사 Series connecting device for battery
WO2019221395A1 (en) * 2018-05-15 2019-11-21 삼성에스디아이주식회사 Battery pack

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Cited By (17)

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Publication number Priority date Publication date Assignee Title
KR101943493B1 (en) 2015-07-22 2019-01-29 주식회사 엘지화학 Battery module assembly and battery pack including the same
KR20170011349A (en) * 2015-07-22 2017-02-02 주식회사 엘지화학 Battery module assembly and battery pack including the same
WO2017014470A1 (en) * 2015-07-22 2017-01-26 주식회사 엘지화학 Battery module assembly and battery pack including same
KR20170019942A (en) 2015-08-13 2017-02-22 한국단자공업 주식회사 Bus bar having connect part and Bus bar assembly having the same
KR20170025524A (en) 2015-08-28 2017-03-08 한국단자공업 주식회사 Flexible PCB assembly and series connection apparatus of battery module the same
WO2018124751A1 (en) * 2016-12-27 2018-07-05 주식회사 유라코퍼레이션 Flexible circuit board and frame assembly including same
KR101928065B1 (en) 2016-12-27 2018-12-11 주식회사 유라코퍼레이션 Connecting structure of bus-bar assembly
KR101928073B1 (en) 2016-12-27 2018-12-11 주식회사 유라코퍼레이션 Connecting structure of bus-bar assembly
KR20180077695A (en) * 2016-12-29 2018-07-09 주식회사 유라코퍼레이션 Connecting structure of bus-bar assembly
KR101928066B1 (en) 2016-12-29 2018-12-11 주식회사 유라코퍼레이션 Connecting structure of bus-bar assembly
KR102033001B1 (en) 2017-02-28 2019-10-16 주식회사 유라코퍼레이션 Frame assembly, method of manufacturing frame assembly, and method of manufacturing battery module
KR20180099438A (en) * 2017-02-28 2018-09-05 주식회사 유라코퍼레이션 Frame assembly, method of manufacturing frame assembly, and method of manufacturing battery module
KR20180099437A (en) * 2017-02-28 2018-09-05 주식회사 유라코퍼레이션 Battery frame assembly and method for manufacturing same
KR102032999B1 (en) 2017-02-28 2019-10-17 주식회사 유라코퍼레이션 Battery frame assembly and method for manufacturing same
KR101919035B1 (en) * 2017-04-21 2018-11-15 한국단자공업 주식회사 Series connection apparatus of battery module
KR101948067B1 (en) 2017-05-31 2019-02-14 한국단자공업 주식회사 Series connecting device for battery
WO2019221395A1 (en) * 2018-05-15 2019-11-21 삼성에스디아이주식회사 Battery pack

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